Just to share my experience and lesson I got this season.
This season I practice inbreeding b/w mother and son and all attempts were a failure.
First clutch 6 eggs were laid and only chick hatched and 5 DIS.The chick growth was very slow and died at 65 days old with crop full
On second round 4 eggs were laid,1st fertile later DIS and 3 infertile.
In third and final clutch 4 eggs laid again and first egg dead in shell after week and still there is 1 fertile egg with 2 infertile.
On the other side
Result b/w Pairing of father and daughter gave me somewhat different result with few clear eggs and 50% hatchlings which r healthy and growing normally.
Any body suffered the same experience in the past or present,plz share because i know some breeders who inbreed his birds with pairings described above and than use unrelated birds to widen the genes.I have been told that first generation chicks r born normal but problem occures later if we continue to breed related birds with out introducing unrelated blood but attempts r failure on first generation.